Lightbox Redirecting

Hello,

i use for my website the following Shortcode for a lightbox for opening a Popup with an registration form (the registration form i get from Ultimate Members):

[su_lightbox type=”inline” src=”#registrierung”] Registrierung [/su_lightbox]
[su_lightbox_content id=”registrierung”]
[ultimatemember form_id=”624″]
[/su_lightbox_content]

If i click on the lightbox/button the registrationform opens. But if I click on “Register (submit the form)” the lightbox closes, doesn’t matter if the registration was succesful or not. If I use the registration form without the lightbox it redirects me to a “Your registration was successfully”-site.

Is there a possibility to use the redirection if I click on Submit/Register instead of closing the light box?

Thank you for your help!